求助：smartGWT form提交 servlet不能获得传值
使用smartGWT构建一个form,里面有一个文本框，一个上传文件，代码如下
String url = "/uploadimage/upload";uploadForm.setTarget("framename");uploadForm.setAction(url);uploadForm.setMethod(FormMethod.POST);uploadForm.setSize("100%", "100%");TextItem textItem = new TextItem("abc"); uploadForm.setEncoding(Encoding.MULTIPART);// uploadForm.setEncoding(Encoding.NORMAL);textItem.setValue("123"); final UploadItem uploadItem = new UploadItem("file", "选择图片");uploadForm.setFields(textItem,uploadItem);